// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

// TODO actually recognize syntax of TypeScript constructs

(function(mod) {
if (typeof exports == "object" && typeof module == "object") // CommonJS
mod(require("../../lib/codemirror"));
else if (typeof define == "function" && define.amd) // AMD
define(["../../lib/codemirror"], mod);
else // Plain browser env
mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode("javascript", function(config, parserConfig) {
var indentUnit = config.indentUnit;
var statementIndent = parserConfig.statementIndent;
var jsonldMode = parserConfig.jsonld;
var jsonMode = parserConfig.json || jsonldMode;
var isTS = parserConfig.typescript;
var wordRE = parserConfig.wordCharacters || /[\w$]/;

// Tokenizer

var keywords = function(){
function kw(type) {return {type: type, style: "keyword"};}
var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c");
var operator = kw("operator"), atom = {type: "atom", style: "atom"};

var jsKeywords = {
"if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
"return": C, "break": C, "continue": C, "new": C, "delete": C, "throw": C, "debugger": C,
"var": kw("var"), "const": kw("var"), "let": kw("var"),
"function": kw("function"), "catch": kw("catch"),
"for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
"in": operator, "typeof": operator, "instanceof": operator,
"true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
"this": kw("this"), "module": kw("module"), "class": kw("class"), "super": kw("atom"),
"yield": C, "export": kw("export"), "import": kw("import"), "extends": C
};

// Extend the 'normal' keywords with the TypeScript language extensions
if (isTS) {
var type = {type: "variable", style: "variable-3"};
var tsKeywords = {
// object-like things
"interface": kw("interface"),
"extends": kw("extends"),
"constructor": kw("constructor"),

// scope modifiers
"public": kw("public"),
"private": kw("private"),
"protected": kw("protected"),
"static": kw("static"),

// types
"string": type, "number": type, "bool": type, "any": type
};

for (var attr in tsKeywords) {
jsKeywords[attr] = tsKeywords[attr];
}
}

return jsKeywords;
}();

var isOperatorChar = /[+\-*&%=<>!?|~^]/;
var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;

function readRegexp(stream) {
var escaped = false, next, inSet = false;
while ((next = stream.next()) != null) {
if (!escaped) {
if (next == "/" && !inSet) return;
if (next == "[") inSet = true;
else if (inSet && next == "]") inSet = false;
}
escaped = !escaped && next == "\\";
}
}

// Used as scratch variables to communicate multiple values without
// consing up tons of objects.
var type, content;
function ret(tp, style, cont) {
type = tp; content = cont;
return style;
}
function tokenBase(stream, state) {
var ch = stream.next();
if (ch == '"' || ch == "'") {
state.tokenize = tokenString(ch);
return state.tokenize(stream, state);
} else if (ch == "." && stream.match(/^\d+(?:[eE][+\-]?\d+)?/)) {
return ret("number", "number");
} else if (ch == "." && stream.match("..")) {
return ret("spread", "meta");
} else if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
return ret(ch);
} else if (ch == "=" && stream.eat(">")) {
return ret("=>", "operator");
} else if (ch == "0" && stream.eat(/x/i)) {
stream.eatWhile(/[\da-f]/i);
return ret("number", "number");
} else if (/\d/.test(ch)) {
stream.match(/^\d*(?:\.\d*)?(?:[eE][+\-]?\d+)?/);
return ret("number", "number");
} else if (ch == "/") {
if (stream.eat("*")) {
state.tokenize = tokenComment;
return tokenComment(stream, state);
} else if (stream.eat("/")) {
stream.skipToEnd();
return ret("comment", "comment");
} else if (state.lastType == "operator" || state.lastType == "keyword c" ||
state.lastType == "sof" || /^[\[{}\(,;:]$/.test(state.lastType)) {
readRegexp(stream);
stream.eatWhile(/[gimy]/); // 'y' is "sticky" option in Mozilla
return ret("regexp", "string-2");
} else {
stream.eatWhile(isOperatorChar);
return ret("operator", "operator", stream.current());
}
} else if (ch == "`") {
state.tokenize = tokenQuasi;
return tokenQuasi(stream, state);
} else if (ch == "#") {
stream.skipToEnd();
return ret("error", "error");
} else if (isOperatorChar.test(ch)) {
stream.eatWhile(isOperatorChar);
return ret("operator", "operator", stream.current());
} else if (wordRE.test(ch)) {
stream.eatWhile(wordRE);
var word = stream.current(), known = keywords.propertyIsEnumerable(word) && keywords[word];
return (known && state.lastType != ".") ? ret(known.type, known.style, word) :
ret("variable", "variable", word);
}
}

function tokenString(quote) {
return function(stream, state) {
var escaped = false, next;
if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
state.tokenize = tokenBase;
return ret("jsonld-keyword", "meta");
}
while ((next = stream.next()) != null) {
if (next == quote && !escaped) break;
escaped = !escaped && next == "\\";
}
if (!escaped) state.tokenize = tokenBase;
return ret("string", "string");
};
}

function tokenComment(stream, state) {
var maybeEnd = false, ch;
while (ch = stream.next()) {
if (ch == "/" && maybeEnd) {
state.tokenize = tokenBase;
break;
}
maybeEnd = (ch == "*");
}
return ret("comment", "comment");
}

function tokenQuasi(stream, state) {
var escaped = false, next;
while ((next = stream.next()) != null) {
if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) {
state.tokenize = tokenBase;
break;
}
escaped = !escaped && next == "\\";
}
return ret("quasi", "string-2", stream.current());
}

var brackets = "([{}])";
// This is a crude lookahead trick to try and notice that we're
// parsing the argument patterns for a fat-arrow function before we
// actually hit the arrow token. It only works if the arrow is on
// the same line as the arguments and there's no strange noise
// (comments) in between. Fallback is to only notice when we hit the
// arrow, and not declare the arguments as locals for the arrow
// body.
function findFatArrow(stream, state) {
if (state.fatArrowAt) state.fatArrowAt = null;
var arrow = stream.string.indexOf("=>", stream.start);
if (arrow < 0) return;

var depth = 0, sawSomething = false;
for (var pos = arrow - 1; pos >= 0; --pos) {
var ch = stream.string.charAt(pos);
var bracket = brackets.indexOf(ch);
if (bracket >= 0 && bracket < 3) {
if (!depth) { ++pos; break; }
if (--depth == 0) break;
} else if (bracket >= 3 && bracket < 6) {
++depth;
} else if (wordRE.test(ch)) {
sawSomething = true;
} else if (sawSomething && !depth) {
++pos;
break;
}
}
if (sawSomething && !depth) state.fatArrowAt = pos;
}

// Parser

var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true, "this": true, "jsonld-keyword": true};

function JSLexical(indented, column, type, align, prev, info) {
this.indented = indented;
this.column = column;
this.type = type;
this.prev = prev;
this.info = info;
if (align != null) this.align = align;
}

function inScope(state, varname) {
for (var v = state.localVars; v; v = v.next)
if (v.name == varname) return true;
for (var cx = state.context; cx; cx = cx.prev) {
for (var v = cx.vars; v; v = v.next)
if (v.name == varname) return true;
}
}

function parseJS(state, style, type, content, stream) {
var cc = state.cc;
// Communicate our context to the combinators.
// (Less wasteful than consing up a hundred closures on every call.)
cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc; cx.style = style;

if (!state.lexical.hasOwnProperty("align"))
state.lexical.align = true;

while(true) {
var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
if (combinator(type, content)) {
while(cc.length && cc[cc.length - 1].lex)
cc.pop()();
if (cx.marked) return cx.marked;
if (type == "variable" && inScope(state, content)) return "variable-2";
return style;
}
}
}

// Combinator utils

var cx = {state: null, column: null, marked: null, cc: null};
function pass() {
for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
}
function cont() {
pass.apply(null, arguments);
return true;
}
function register(varname) {
function inList(list) {
for (var v = list; v; v = v.next)
if (v.name == varname) return true;
return false;
}
var state = cx.state;
if (state.context) {
cx.marked = "def";
if (inList(state.localVars)) return;
state.localVars = {name: varname, next: state.localVars};
} else {
if (inList(state.globalVars)) return;
if (parserConfig.globalVars)
state.globalVars = {name: varname, next: state.globalVars};
}
}

// Combinators

var defaultVars = {name: "this", next: {name: "arguments"}};
function pushcontext() {
cx.state.context = {prev: cx.state.context, vars: cx.state.localVars};
cx.state.localVars = defaultVars;
}
function popcontext() {
cx.state.localVars = cx.state.context.vars;
cx.state.context = cx.state.context.prev;
}
function pushlex(type, info) {
var result = function() {
var state = cx.state, indent = state.indented;
if (state.lexical.type == "stat") indent = state.lexical.indented;
else for (var outer = state.lexical; outer && outer.type == ")" && outer.align; outer = outer.prev)
indent = outer.indented;
state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info);
};
result.lex = true;
return result;
}
function poplex() {
var state = cx.state;
if (state.lexical.prev) {
if (state.lexical.type == ")")
state.indented = state.lexical.indented;
state.lexical = state.lexical.prev;
}
}
poplex.lex = true;

function expect(wanted) {
function exp(type) {
if (type == wanted) return cont();
else if (wanted == ";") return pass();
else return cont(exp);
};
return exp;
}

function statement(type, value) {
if (type == "var") return cont(pushlex("vardef", value.length), vardef, expect(";"), poplex);
if (type == "keyword a") return cont(pushlex("form"), expression, statement, poplex);
if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
if (type == "{") return cont(pushlex("}"), block, poplex);
if (type == ";") return cont();
if (type == "if") {
if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
cx.state.cc.pop()();
return cont(pushlex("form"), expression, statement, poplex, maybeelse);
}
if (type == "function") return cont(functiondef);
if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
if (type == "variable") return cont(pushlex("stat"), maybelabel);
if (type == "switch") return cont(pushlex("form"), expression, pushlex("}", "switch"), expect("{"),
block, poplex, poplex);
if (type == "case") return cont(expression, expect(":"));
if (type == "default") return cont(expect(":"));
if (type == "catch") return cont(pushlex("form"), pushcontext, expect("("), funarg, expect(")"),
statement, poplex, popcontext);
if (type == "module") return cont(pushlex("form"), pushcontext, afterModule, popcontext, poplex);
if (type == "class") return cont(pushlex("form"), className, poplex);
if (type == "export") return cont(pushlex("form"), afterExport, poplex);
if (type == "import") return cont(pushlex("form"), afterImport, poplex);
return pass(pushlex("stat"), expression, expect(";"), poplex);
}
function expression(type) {
return expressionInner(type, false);
}
function expressionNoComma(type) {
return expressionInner(type, true);
}
function expressionInner(type, noComma) {
if (cx.state.fatArrowAt == cx.stream.start) {
var body = noComma ? arrowBodyNoComma : arrowBody;
if (type == "(") return cont(pushcontext, pushlex(")"), commasep(pattern, ")"), poplex, expect("=>"), body, popcontext);
else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
}

var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
if (type == "function") return cont(functiondef, maybeop);
if (type == "keyword c") return cont(noComma ? maybeexpressionNoComma : maybeexpression);
if (type == "(") return cont(pushlex(")"), maybeexpression, comprehension, expect(")"), poplex, maybeop);
if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
if (type == "{") return contCommasep(objprop, "}", null, maybeop);
if (type == "quasi") { return pass(quasi, maybeop); }
return cont();
}
function maybeexpression(type) {
if (type.match(/[;\}\)\],]/)) return pass();
return pass(expression);
}
function maybeexpressionNoComma(type) {
if (type.match(/[;\}\)\],]/)) return pass();
return pass(expressionNoComma);
}

function maybeoperatorComma(type, value) {
if (type == ",") return cont(expression);
return maybeoperatorNoComma(type, value, false);
}
function maybeoperatorNoComma(type, value, noComma) {
var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma;
var expr = noComma == false ? expression : expressionNoComma;
if (type == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext);
if (type == "operator") {
if (/\+\+|--/.test(value)) return cont(me);
if (value == "?") return cont(expression, expect(":"), expr);
return cont(expr);
}
if (type == "quasi") { return pass(quasi, me); }
if (type == ";") return;
if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
if (type == ".") return cont(property, me);
if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
}
function quasi(type, value) {
if (type != "quasi") return pass();
if (value.slice(value.length - 2) != "${") return cont(quasi);
return cont(expression, continueQuasi);
}
function continueQuasi(type) {
if (type == "}") {
cx.marked = "string-2";
cx.state.tokenize = tokenQuasi;
return cont(quasi);
}
}
function arrowBody(type) {
findFatArrow(cx.stream, cx.state);
return pass(type == "{" ? statement : expression);
}
function arrowBodyNoComma(type) {
findFatArrow(cx.stream, cx.state);
return pass(type == "{" ? statement : expressionNoComma);
}
function maybelabel(type) {
if (type == ":") return cont(poplex, statement);
return pass(maybeoperatorComma, expect(";"), poplex);
}
function property(type) {
if (type == "variable") {cx.marked = "property"; return cont();}
}
function objprop(type, value) {
if (type == "variable" || cx.style == "keyword") {
cx.marked = "property";
if (value == "get" || value == "set") return cont(getterSetter);
return cont(afterprop);
} else if (type == "number" || type == "string") {
cx.marked = jsonldMode ? "property" : (cx.style + " property");
return cont(afterprop);
} else if (type == "jsonld-keyword") {
return cont(afterprop);
} else if (type == "[") {
return cont(expression, expect("]"), afterprop);
}
}
function getterSetter(type) {
if (type != "variable") return pass(afterprop);
cx.marked = "property";
return cont(functiondef);
}
function afterprop(type) {
if (type == ":") return cont(expressionNoComma);
if (type == "(") return pass(functiondef);
}
function commasep(what, end) {
function proceed(type) {
if (type == ",") {
var lex = cx.state.lexical;
if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
return cont(what, proceed);
}
if (type == end) return cont();
return cont(expect(end));
}
return function(type) {
if (type == end) return cont();
return pass(what, proceed);
};
}
function contCommasep(what, end, info) {
for (var i = 3; i < arguments.length; i++)
cx.cc.push(arguments[i]);
return cont(pushlex(end, info), commasep(what, end), poplex);
}
function block(type) {
if (type == "}") return cont();
return pass(statement, block);
}
function maybetype(type) {
if (isTS && type == ":") return cont(typedef);
}
function typedef(type) {
if (type == "variable"){cx.marked = "variable-3"; return cont();}
}
function vardef() {
return pass(pattern, maybetype, maybeAssign, vardefCont);
}
function pattern(type, value) {
if (type == "variable") { register(value); return cont(); }
if (type == "[") return contCommasep(pattern, "]");
if (type == "{") return contCommasep(proppattern, "}");
}
function proppattern(type, value) {
if (type == "variable" && !cx.stream.match(/^\s*:/, false)) {
register(value);
return cont(maybeAssign);
}
if (type == "variable") cx.marked = "property";
return cont(expect(":"), pattern, maybeAssign);
}
function maybeAssign(_type, value) {
if (value == "=") return cont(expressionNoComma);
}
function vardefCont(type) {
if (type == ",") return cont(vardef);
}
function maybeelse(type, value) {
if (type == "keyword b" && value == "else") return cont(pushlex("form", "else"), statement, poplex);
}
function forspec(type) {
if (type == "(") return cont(pushlex(")"), forspec1, expect(")"), poplex);
}
function forspec1(type) {
if (type == "var") return cont(vardef, expect(";"), forspec2);
if (type == ";") return cont(forspec2);
if (type == "variable") return cont(formaybeinof);
return pass(expression, expect(";"), forspec2);
}
function formaybeinof(_type, value) {
if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression); }
return cont(maybeoperatorComma, forspec2);
}
function forspec2(type, value) {
if (type == ";") return cont(forspec3);
if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression); }
return pass(expression, expect(";"), forspec3);
}
function forspec3(type) {
if (type != ")") cont(expression);
}
function functiondef(type, value) {
if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
if (type == "variable") {register(value); return cont(functiondef);}
if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, statement, popcontext);
}
function funarg(type) {
if (type == "spread") return cont(funarg);
return pass(pattern, maybetype);
}
function className(type, value) {
if (type == "variable") {register(value); return cont(classNameAfter);}
}
function classNameAfter(type, value) {
if (value == "extends") return cont(expression, classNameAfter);
if (type == "{") return cont(pushlex("}"), classBody, poplex);
}
function classBody(type, value) {
if (type == "variable" || cx.style == "keyword") {
cx.marked = "property";
if (value == "get" || value == "set") return cont(classGetterSetter, functiondef, classBody);
return cont(functiondef, classBody);
}
if (value == "*") {
cx.marked = "keyword";
return cont(classBody);
}
if (type == ";") return cont(classBody);
if (type == "}") return cont();
}
function classGetterSetter(type) {
if (type != "variable") return pass();
cx.marked = "property";
return cont();
}
function afterModule(type, value) {
if (type == "string") return cont(statement);
if (type == "variable") { register(value); return cont(maybeFrom); }
}
function afterExport(_type, value) {
if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
return pass(statement);
}
function afterImport(type) {
if (type == "string") return cont();
return pass(importSpec, maybeFrom);
}
function importSpec(type, value) {
if (type == "{") return contCommasep(importSpec, "}");
if (type == "variable") register(value);
return cont();
}
function maybeFrom(_type, value) {
if (value == "from") { cx.marked = "keyword"; return cont(expression); }
}
function arrayLiteral(type) {
if (type == "]") return cont();
return pass(expressionNoComma, maybeArrayComprehension);
}
function maybeArrayComprehension(type) {
if (type == "for") return pass(comprehension, expect("]"));
if (type == ",") return cont(commasep(expressionNoComma, "]"));
return pass(commasep(expressionNoComma, "]"));
}
function comprehension(type) {
if (type == "for") return cont(forspec, comprehension);
if (type == "if") return cont(expression, comprehension);
}

// Interface

return {
startState: function(basecolumn) {
var state = {
tokenize: tokenBase,
lastType: "sof",
cc: [],
lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
localVars: parserConfig.localVars,
context: parserConfig.localVars && {vars: parserConfig.localVars},
indented: 0
};
if (parserConfig.globalVars && typeof parserConfig.globalVars == "object")
state.globalVars = parserConfig.globalVars;
return state;
},

token: function(stream, state) {
if (stream.sol()) {
if (!state.lexical.hasOwnProperty("align"))
state.lexical.align = false;
state.indented = stream.indentation();
findFatArrow(stream, state);
}
if (state.tokenize != tokenComment && stream.eatSpace()) return null;
var style = state.tokenize(stream, state);
if (type == "comment") return style;
state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
return parseJS(state, style, type, content, stream);
},

indent: function(state, textAfter) {
if (state.tokenize == tokenComment) return CodeMirror.Pass;
if (state.tokenize != tokenBase) return 0;
var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical;
// Kludge to prevent 'maybelse' from blocking lexical scope pops
if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
var c = state.cc[i];
if (c == poplex) lexical = lexical.prev;
else if (c != maybeelse) break;
}
if (lexical.type == "stat" && firstChar == "}") lexical = lexical.prev;
if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
lexical = lexical.prev;
var type = lexical.type, closing = firstChar == type;

if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info + 1 : 0);
else if (type == "form" && firstChar == "{") return lexical.indented;
else if (type == "form") return lexical.indented + indentUnit;
else if (type == "stat")
return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? statementIndent || indentUnit : 0);
else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false)
return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
else if (lexical.align) return lexical.column + (closing ? 0 : 1);
else return lexical.indented + (closing ? 0 : indentUnit);
},

electricChars: ":{}",
blockCommentStart: jsonMode ? null : "/*",
blockCommentEnd: jsonMode ? null : "*/",
lineComment: jsonMode ? null : "//",
fold: "brace",

helperType: jsonMode ? "json" : "javascript",
jsonldMode: jsonldMode,
jsonMode: jsonMode
};
});

CodeMirror.registerHelper("wordChars", "javascript", /[\w$]/);

CodeMirror.defineMIME("text/javascript", "javascript");
CodeMirror.defineMIME("text/ecmascript", "javascript");
CodeMirror.defineMIME("application/javascript", "javascript");
CodeMirror.defineMIME("application/x-javascript", "javascript");
CodeMirror.defineMIME("application/ecmascript", "javascript");
CodeMirror.defineMIME("application/json", {name: "javascript", json: true});
CodeMirror.defineMIME("application/x-json", {name: "javascript", json: true});
CodeMirror.defineMIME("application/ld+json", {name: "javascript", jsonld: true});
CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });

});

